“Our alliance is leading on some of the most important and pressing issues of our time,” Harris said in remarks with Yoon by her side at the NASA facility. From left, South Korean first lady Kim Keon-hee, South Korean President Yoon Suk -yeol, US President Joe Biden and US first lady Jill Biden (obscured) visit the Korean War Veterans’ Memorial in Washington on Tuesday. NASA and Seoul’s Korea Aerospace Research Institute are working together to support future lunar exploration efforts, he said. Yoon yesterday was scheduled to visit the White House, an unnamed US official said. Other officials, speaking on condition of anonymity, said that there were no plans to station US nuclear weapons in South Korea.